Vulnerability CVE-2014-2038
Published: 2014-02-28

Description:
The nfs_can_extend_write function in fs/nfs/write.c in the Linux kernel before 3.13.3 relies on a write delegation to extend a write operation without a certain up-to-date verification, which allows local users to obtain sensitive information from kernel memory in opportunistic circumstances by writing to a file in an NFS filesystem and then reading the same file.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Linux Kernel nfs information leakage
PJP
21.02.2014

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:L/AC:H/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.7/10
6.4/10
1.9/10
Exploit range
Attack complexity
Authentication
Local
High
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Linux -> Linux kernel 

 References:
https://github.com/torvalds/linux/commit/263b4509ec4d47e0da3e753f85a39ea12d1eff24
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=263b4509ec4d47e0da3e753f85a39ea12d1eff24
https://bugzilla.redhat.com/show_bug.cgi?id=1066939
http://www.openwall.com/lists/oss-security/2014/02/20/16
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.3
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